Mock Urban Setting Trial: Data Analysis and Interpretation
Abstract
This report describes a comprehensive study of the statistical characteristics of concentration fluctuations in a neutrally buoyant tracer plume dispersing through a large array of building-like obstacles, each of which measured 12.2 m x 2.42 m x 2.54 m. The plumes were released both upwind and within the obstacle array for a range of source heights between 0.15 and 5.2 m. Detailed flow field and instantaneous plume concentration data were obtained from a comprehensive series of tracer experiments which utilized a large number of high-resolution concentration detectors. accompanied by the simultaneous acquisition of meteorological and turbulence measurements with sonic anemometer/ thermometers. Extensive analyses are performed on the plume concentration data, and results are presented for a number of concentration statistics such as the mean plume lateral and vertical spreads, mean concentration, fluctuation intensity, peak concentration to concentration standard deviation ratio, concentration probability density function (pdf). concentration power spectra, and various concentration time and length scales of dominant motions in the array plume (e.g., integral scale, Taylor microscale).
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 2003
- Accession Number
- ADA421837
Entities
People
- Eugene Yee